Fiber body manufacturing apparatus and defiberizing apparatus
By using a rotating screen structure and a thickness detection and control system, the problem of uneven sheet thickness was solved, and the uniformity and quality of sheet thickness were improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SEIKO EPSON CORP
- Filing Date
- 2023-01-04
- Publication Date
- 2026-07-14
AI Technical Summary
Existing separation devices are prone to causing uneven sheet thickness during the sheet manufacturing process, making it difficult to control effectively.
The separation component, which employs a rotating screen structure, combined with thickness detection and control components, achieves precise separation and stacking of the de-fiber material through suction and jetting airflow, ensuring uniform sheet thickness.
This achieves uniform control of the sheet thickness, improving the quality and consistency of the sheets.
Smart Images
Figure CN116411387B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a fiber manufacturing apparatus and a fiber desiccation apparatus. Background Technology
[0002] A separation device for removing foreign matter or the like from a supplied material has been known for a long time (see, for example, Patent Document 1).
[0003] As in patent document 1 Figure 1 As shown, the separation device has a circular plate-shaped screen 1, a spray outlet 2 disposed on one side of the screen 1, a suction port 3 disposed on the opposite side of the spray outlet 2 across the screen 1, a spray outlet 4 disposed on the other side of the screen 1 at a different position than the suction port 3, and a suction port 5 disposed on the opposite side of the spray outlet 4 across the screen 1.
[0004] By supplying the de-fiber material to the screen 1 from the nozzle 2 and suctioning it from the suction port 3, excessively fine de-fiber material can be removed. Furthermore, foreign matter in the de-fiber material can also be removed at this time. In addition, by rotating the screen 1, the de-fiber material remaining on the screen 1 is also moved, and at the destination, the de-fiber material can be detached from the screen 1 by air ejected from the nozzle 4, and then recovered by suction from the suction port 5.
[0005] However, in the separation apparatus described in Patent Document 1, there is a possibility that the thickness of the manufactured sheet may be uneven depending on the separation conditions.
[0006] Patent Document 1: Japanese Patent Application Publication No. 7-108224 Summary of the Invention
[0007] This invention is a solution to the aforementioned problems and can be implemented in the following ways.
[0008] The fibrous material manufacturing apparatus of the present invention is characterized by comprising: a material supply unit for supplying fibrous material; a defibering unit for defibering the material supplied from the material supply unit; a separation unit having a rotating member, a suction unit, and a recovery unit, wherein the rotating member has a first surface and a second surface in a face-to-back relationship, and at least a portion of the rotating member is constituted by a screen to supply the defibered material generated by the defibering unit to the first surface, the suction unit is disposed on the second surface side of the rotating member and suctions the defibered material via the screen to remove foreign matter, and the recovery unit recovers the defibered material on the first surface after the foreign matter has been removed; an accumulation unit for accumulating the defibered material after the foreign matter has been removed; a sheet forming unit for forming the accumulation generated by the accumulation unit into a sheet; a thickness detection unit for detecting the thickness of the sheet formed by the sheet forming unit; and a control unit for controlling the operation of the separation unit based on the detection result of the thickness detection unit.
[0009] The defiber-removing apparatus of the present invention is characterized by comprising: a material supply unit for supplying a material containing fibers; a defiber-removing unit for defibering the material supplied from the material supply unit; a separation unit having a rotating component, a suction unit, and a recovery unit, wherein the rotating component has a first surface and a second surface in a face-to-back relationship, and at least a portion of the rotating component is constituted by a screen, so that the defibered material generated by the defiber-removing unit is supplied to the first surface, the suction unit is disposed on the second surface side of the rotating component and suctions the defibered material via the screen to remove foreign matter, and the recovery unit recovers the defibered material on the first surface after the foreign matter has been removed; an accumulation unit for accumulating the defibered material after the foreign matter has been removed; a thickness detection unit for detecting the thickness of the accumulation generated by the accumulation unit; and a control unit for controlling the operation of the separation unit based on the detection result of the thickness detection unit. Attached Figure Description
[0010] Figure 1 A schematic side view showing the fiber manufacturing apparatus according to the first embodiment of the present invention.
[0011] Figure 2 for Figure 1 The diagram shows a block diagram of a fiber manufacturing apparatus.
[0012] Figure 3 for Figure 1 A three-dimensional view of the separated part is shown.
[0013] Figure 4 for Figure 3 A top view of the separated section shown.
[0014] Figure 5 For use in Figure 2 The flowchart illustrates the control operations performed by the control unit.
[0015] Figure 6 This is a flowchart illustrating the control operations performed by the control unit included in the fiber manufacturing apparatus of the second embodiment of the present invention.
[0016] Figure 7 This is a schematic side view of the thickness detection unit and its surrounding parts provided in the fiber manufacturing apparatus according to the third embodiment of the present invention.
[0017] Figure 8 This is a schematic side view of the thickness detection unit and its surrounding parts provided in the fiber manufacturing apparatus according to the fourth embodiment of the present invention. Detailed Implementation
[0018] Hereinafter, the fiber manufacturing apparatus and the fiber unwinding apparatus of the present invention will be described in detail based on the preferred embodiments shown in the accompanying drawings.
[0019] First Implementation Method
[0020] Figure 1 A schematic side view showing the fiber manufacturing apparatus according to the first embodiment of the present invention. Figure 2 for Figure 1 The diagram shows a block diagram of a fiber manufacturing apparatus. Figure 3 for Figure 1 A three-dimensional view of the separated part is shown.
[0021] Figure 4 for Figure 3 A top view of the separated section shown. Figure 5 For use in Figure 2 The flowchart illustrates the control operations performed by the control unit.
[0022] Furthermore, for ease of explanation in the following text, therefore, as follows Figure 1 As shown, the three mutually orthogonal axes are designated as the x-axis, y-axis, and z-axis. Furthermore, the xy-plane, which includes the x and y axes, is horizontal, and the z-axis is vertical. Additionally, the direction in which the arrow marks on each axis point is called "+", and the opposite direction is called "-". Furthermore, sometimes... Figure 1 as well as Figure 3 The upper side is called "upper" or "above", and the lower side is called "lower" or "below".
[0023] like Figure 1 as well as Figure 2As shown, the fiber manufacturing apparatus 100 includes a raw material supply unit 11, a coarse crushing unit 12, a defiberizing unit 13, a separation unit 10, a mixing unit 17, a disassembly unit 18, a sheet forming unit 19, a thin sheet forming unit 20, a cutting unit 21, a material preparation unit 22, a recycling unit 27, a thickness detection unit 8, and a control unit 28. Furthermore, the raw material supply unit 11 and the coarse crushing unit 12 constitute a material supply unit. Furthermore, the raw material supply unit 11, the coarse crushing unit 12, the defiberizing unit 13, the separation unit 10, the mixing unit 17, the disassembly unit 18, and the sheet forming unit 19 constitute a defiberizing device 1. Each part of the defiberizing device 1 is electrically connected to the control unit 28, thereby controlling the operation of each part through the control unit 28. Furthermore, although in this embodiment the control unit 28 provided by the defiberization device 1 is configured to control each part of the fiber manufacturing apparatus 100, it is not limited to this, and may also have a control unit that controls parts of the fiber manufacturing apparatus 100 other than the defiberization device 1.
[0024] Furthermore, the fiber manufacturing apparatus 100 includes humidification units 231, 234, and 236. Additionally, the fiber manufacturing apparatus 100 includes blowers 261, 262, 263, and 264. Furthermore, the airflow of blowers 261, 262, 263, and 264 can be varied by changing the power supply conditions.
[0025] Furthermore, in the fiber manufacturing apparatus 100, the raw material supply process, the coarse crushing process, the fiber defibering process, the separation process, the mixing process, the disassembly process, the sheet forming process, the thin sheet forming process, and the cutting process are performed in this order.
[0026] The structure of each part will be explained below.
[0027] The raw material supply unit 11 is a part that performs the raw material supply process of supplying raw material M1 to the coarse crushing unit 12. This raw material M1 is a sheet-like material composed of fibrous material. Furthermore, raw material M1 can be woven fabric, non-woven fabric, etc., and its form is arbitrary. Additionally, raw material M1 can be, for example, recycled paper made by de-fiberizing waste paper, or synthetic paper such as YUPO paper (registered trademark), or it may not be recycled paper. In this embodiment, raw material M1 is used or unused waste paper.
[0028] The coarse crushing section 12 is a section that performs a coarse crushing process in which the raw material M1 supplied from the raw material supply section 11 is coarsely crushed in a gaseous environment such as the atmosphere. The coarse crushing section 12 has a pair of coarse crushing blades 121, a chute 122, and a metering supply section 123.
[0029] A pair of coarse crushing blades 121 rotate in opposite directions, thereby coarsely crushing the raw material M1 between them, that is, cutting the raw material M1 into coarse fragments M2. The shape and size of the coarse fragments M2 are preferably suitable for the defibering process in the defibering section 13. For example, they are preferably small pieces with a side length of 100 mm or less, and more preferably small pieces with a length of 10 mm or more and 70 mm or less.
[0030] The groove 122 is positioned below a pair of coarse cutting blades 121 and is, for example, funnel-shaped. Thus, the groove 122 is able to receive the coarse fragments M2 that fall down after being coarsened by the coarse cutting blades 121.
[0031] Furthermore, a humidifying unit 231 is arranged above the chute 122, adjacent to a pair of coarse cutting blades 121. The humidifying unit 231 is a component that humidifies the coarse fragments M2 within the chute 122. This humidifying unit 231 is constructed using an vaporization type or a warm air vaporization type humidifier, which has a filter (not shown) containing moisture, and supplies humidified air with increased humidity to the coarse fragments M2 by passing air through the filter. By supplying humidified air to the coarse fragments M2, it is possible to suppress the coarse fragments M2 from adhering to the chute 122 or the like due to static electricity.
[0032] The chute 122 is connected to the defiberization section 13 via the pipe 241. The coarse fragments M2 collected in the chute 122 are transported to the metering supply section 123 through the pipe 241.
[0033] Although not illustrated, the quantitative supply unit 123 includes a storage section for temporarily storing coarse fragments M2, a metering section for measuring the coarse fragments M2 discharged from the storage section, and a discharge section for discharging the coarse fragments M2 when the weight in the metering section reaches a set value. In this embodiment, the load sensor of the metering section constitutes the weight detection unit 8. Thus, according to the quantitative supply unit 123, a set weight of coarse fragments M2 can be discharged intermittently and quantitatively fed to the debonding unit 13.
[0034] The defiberization section 13 is the part that performs the defiberization process of defibering the coarse fragments M2 in a gas environment, i.e., in a dry manner. Through the defiberization process in the defiberization section 13, defiberized material M3 can be generated from the coarse fragments M2. Here, "defiberization" means breaking down the coarse fragments M2, which are bonded together with multiple fibers, into individual fibers. Moreover, the broken-down material is called defiberized material M3. The shape of defiberized material M3 is linear or ribbon-like. In addition, defiberized material M3 can also exist in a state where they are intertwined and form a block, i.e., forming a so-called "clump".
[0035] For example, in this embodiment, the defibering section 13 is constituted by an impeller mill having a rotor that rotates at high speed and a bushing located on the outer periphery of the rotor. The coarse fragments M2 flowing into the defibering section 13 are clamped between the rotor and the bushing and thus defibered.
[0036] Furthermore, the defiberization section 13 generates an airflow, or airflow, from the coarse crushing section 12 toward the defiberization apparatus 1 through the rotation of the rotor. This allows the coarse crushing material M2 to be drawn from the pipe 241 into the defiberization section 13. After the defiberization process, the defiberized material M3 can be discharged into the defiberization apparatus 1 via the pipe 242.
[0037] A blower 261 is installed midway through pipe 242. The blower 261 is an airflow generating device that generates airflow toward the debonding device 1. This facilitates the delivery of the debonded material M3 to the debonding device 1.
[0038] The defiberization apparatus 1 is a device for performing a separation process that screens the defiberized material M3 according to the length of the fibers and removes foreign matter from the defiberized material M3. The structure of the defiberization apparatus 1 will be described in detail later. The defiberized material M3 is decomposed by removing foreign matter such as coloring materials through the defiberization apparatus 1, and becomes a defiberized material M4 containing fibers of a predetermined length or longer, that is, fibers of a length suitable for sheet manufacturing. Then, the defiberized material M4 is sent to the downstream mixing section 17.
[0039] A mixing section 17 is disposed downstream of the defiberizing device 1. The mixing section 17 is a part that performs a mixing process of mixing the defiberized material M4 with the binder P1. The mixing section 17 includes a binder supply section 171, a pipe 172, and a blower 173.
[0040] The tube 172 is a flow channel that connects the second suction section 7 of the defiber-debonding device 1 and the housing section 182 of the disassembly section 18, and allows the mixture M7 of the defiber M4 and the binder P1 to pass through.
[0041] A binder supply section 171 is connected midway through the pipe 172. The binder supply section 171 has a screw feeder 174. The screw feeder 174 is driven to rotate, thereby supplying the binder P1 as powder or particles into the pipe 172. The binder P1 supplied into the pipe 172 is mixed together with the defibrilant M4 to form a mixture M7.
[0042] Furthermore, binder P1 is a substance that binds fibers together in subsequent processes. Examples include starch, dextrin, glycogen, amylose, hyaluronic acid, kudzu, konjac, hog pollen, etherified starch, esterified starch, natural gum pastes (etherified tamarind gum, etherified locust bean gum, etherified guar gum, gum arabic), fiber-sensing pastes (etherified carboxymethyl cellulose, hydroxyethyl cellulose), seaweed (sodium alginate, agar), animal proteins (collagen, gelatin, hydrolyzed collagen, sericin), and other naturally derived components, as well as polyvinyl alcohol, polyacrylic acid, polyacrylamide, etc. One or more of these can be used in combination, but naturally derived components are preferred, and starch is even more preferred. Additionally, thermoplastic resins can also be used. Examples of thermoplastic resins include, for example, AS resin, ABS resin, polyethylene, polypropylene, ethylene-vinyl acetate copolymer (EVA), etc.; polyolefins, modified polyolefins, etc.; acrylic resins such as polymethyl methacrylate; polyvinyl chloride; polystyrene; polyesters such as polyethylene terephthalate and polybutylene terephthalate; and polypropylene resins such as nylon 6, nylon 46, nylon 66, nylon 610, nylon 612, nylon 11, nylon 12, nylon 6-12, and nylon 6-66. The thermoplastic elastomers include various thermoplastic elastomers such as amides (nylon), polyphenylene ether, polyacetal, polyether, polyphenylene ether, polyetheretherketone, polycarbonate, polyphenylene sulfide, thermoplastic polyimide, polyetherimide, aromatic polyesters, styrene-based, polyolefin-based, polyvinyl chloride-based, polyurethane-based, polyester-based, polyamide-based, polybutadiene-based, trans-polyisoprene-based, fluororubber, and chlorinated polyethylene-based, and can be used with one or more of these substances. Preferably, polyester or a substance containing polyester is used as the thermoplastic resin.
[0043] In addition to the binder P1, the substances supplied from the binder supply section 171 may include, for example, a colorant for coloring the fibers, a aggregation inhibitor for inhibiting the aggregation of the fibers or the binder P1, a flame retardant for making the fibers less flammable, and a paper strength enhancer for strengthening the paper strength of the sheet S. Alternatively, a substance in which the above-mentioned substances are pre-included in the binder P1 and compounded may be supplied from the binder supply section 171.
[0044] Furthermore, a blower 173 is provided midway down the pipe 172, downstream of the binder supply section 171. The blower 173, with its rotating blades and other components, mixes the defiberized material M4 with the binder P1. The blower 173 also generates an airflow toward the disassembly section 18. This airflow agitates the defiberized material M4 and binder P1 within the pipe 172. As a result, the mixture M7 flows into the disassembly section 18 in a uniformly dispersed state of defiberized material M4 and binder P1. Furthermore, the defiberized material M4 in the mixture M7 is broken down as it passes through the pipe 172, becoming finer fibers.
[0045] The disassembly section 18 is a part that performs a disassembly process to separate the intertwined fibers in the mixture M7. The disassembly section 18 has a roller section 181 and a housing section 182 for housing the roller section 181.
[0046] The drum section 181 is a sieve consisting of a cylindrical mesh that rotates around its central axis. A mixture M7 flows into this drum section 141. Furthermore, by rotating the drum section 181, fibers and the like in the mixture M7 that are smaller than the mesh openings can pass through it. This causes the mixture M7 to be broken up.
[0047] The housing 182 is connected to the humidification unit 234. The humidification unit 234 is constructed using the same vaporization-type humidifier as the humidification unit 231. Humidifying air is thus supplied inside the housing 182. This humidifying air humidifies the interior of the housing 182, thereby suppressing the adhesion of the mixture M7 to the inner wall of the housing 182 due to static electricity.
[0048] Furthermore, the mixture M7, which is broken up in the roller section 181, falls as it disperses in the air and lands on the sheet forming section 19 located below the roller section 181. The sheet forming section 19 is the part that performs the sheet forming process of forming sheet M8 from the mixture M7. The sheet forming section 19 includes a mesh belt 191, a support roller 192, and a suction section 193.
[0049] The mesh belt 191 is a seamless belt on which the mixture M7 is deposited. The mesh belt 191 is wound on four support rollers 192. Moreover, the mixture M7 on the mesh belt 191 is conveyed downstream by the rotation drive of the support rollers 192.
[0050] Furthermore, most of the mixture M7 on the mesh belt 191 is above the size of the mesh opening of the mesh belt 191. As a result, the passage of the mixture M7 through the mesh belt 191 is restricted, thus allowing it to accumulate on the mesh belt 191. In addition, since the mixture M7 is conveyed downstream along with the mesh belt 191 while accumulating on it, it is formed into layered sheets M8.
[0051] The suction section 193 is a suction mechanism that draws air from below the mesh belt 191. As a result, the mixture M7 can be drawn onto the mesh belt 191, thus promoting the accumulation of the mixture M7 on the mesh belt 191.
[0052] A pipe 246 is connected to the suction section 193. Furthermore, a blower 264 is installed midway along the pipe 246. The operation of the blower 264 generates suction force within the suction section 193.
[0053] A humidification unit 236 is provided downstream of the disassembly section 18. The humidification unit 236 is an ultrasonic humidifier. This allows moisture to be supplied to the sheet M8, thus regulating the moisture content of the sheet M8. This regulation suppresses the adhesion of the sheet M8 to the conveyor belt 191 caused by static electricity. Consequently, the sheet M8 is easily peeled off the conveyor belt 191 at the position where it folds back due to the support roller 192.
[0054] Furthermore, the total amount of water added to the humidification sections 231 to 236 is preferably, for example, 0.5 parts by mass or more and 20 parts by mass or less relative to 100 parts by mass of the material before humidification.
[0055] A sheet forming section 20 is disposed downstream of the sheet forming section 19. The sheet forming section 20 is the part that performs the sheet forming process of forming sheet S from sheet M8. The sheet forming section 20 has a pressure section 201 and a heating section 202.
[0056] The pressing section 201 has a pair of calendering rollers 203, and can press the sheet M9 between the calendering rollers 203 without heating. This increases the density of the sheet M8. Furthermore, the degree of heating, in the case of heating, is preferably such that the binder P1 does not melt. The sheet M8 is then conveyed toward the heating section 202. One of the pair of calendering rollers 203 is a driving roller driven by a motor (not shown), and the other is a driven roller.
[0057] The heating section 202 is used when a thermoplastic resin is used as a binder. The heating section 202 has a pair of heating rollers 204 and is capable of heating and pressurizing the sheet M8 between the heating rollers 204. Through this heating and pressurization, the binder P1 melts within the sheet M8, thereby bonding the fibers together via the molten binder P1. This forms a sheet S. The sheet S is then conveyed toward the cutting section 21. Furthermore, one of the pair of heating rollers 204 is a driving roller driven by an electric motor (not shown), and the other is a driven roller.
[0058] A cutting section 21 is disposed downstream of the sheet forming section 20. The cutting section 21 is the part that performs the cutting process of cutting the sheet S. The cutting section 21 has a first shear 211 and a second shear 212.
[0059] The first shear 211 is a component that cuts the sheet S in a direction that intersects with, and in particular in a direction that is orthogonal to, the conveying direction of the sheet S.
[0060] The second shearer 212 is a component that cuts the sheet S in a direction parallel to the conveying direction of the sheet S on the downstream side of the first shearer 211. This cutting is a process of removing the useless parts of the two ends of the sheet S, namely the ends in the +y axis direction and the -y axis direction, so as to make the width of the sheet S neat. The parts that are cut off are called so-called "scrap".
[0061] By cutting with the first shear 211 and the second shear 212, a sheet S of the desired shape and size is obtained. Furthermore, the sheet S is conveyed downstream and stored in the preparation section 22.
[0062] like Figure 1 as well as Figure 2 As shown, the thickness detection unit 8 is a part installed in the material preparation unit 22 to detect the thickness of the sheet S after it is cut by the cutting unit 21. The thickness detection unit 8 is electrically connected to the control unit 28, so that information related to the detection result detected by the thickness detection unit 8 is sent to the control unit 28 as an electrical signal. The thickness detection unit 8 can be a contact type thickness detection unit that detects the displacement of the contact point, or a non-contact type thickness detection unit such as an optical type or an electrostatic capacitance type.
[0063] Next, the fiber unwinding device 1 will be described.
[0064] like Figures 1 to 3As shown, the defiberization device 1 includes the aforementioned raw material supply unit 11, coarse crushing unit 12, defiberization unit 13, separation unit 10, thickness detection unit 8, and control unit 28. The separation unit 10 includes a rotating component 3, a first ejection unit 4, a first suction unit 5 (suction unit), a second ejection unit 6, a second suction unit 7, and a motor 33. The rotating component 3 has a screen 31. The first ejection unit 4 ejects defiber material M3 along with air onto the screen 31 for supply. The first suction unit 5 suctions a portion of the defiber material M3 on the screen 31. The second ejection unit 6 ejects air towards the suctioned and generated defiber material M4. The second suction unit 7 suctions the defiber material M4 for recovery. Furthermore, the rotating component 3, the second ejection unit 6, and the second suction unit 7 constitute a recovery unit for recovering the defiber material M4 remaining on the first surface 311.
[0065] like Figure 3 As shown, the rotating component 3 has a screen 31 that is circular when viewed from above, and a support component 32 that supports the screen 31.
[0066] The screen 31 has a first surface 311 and a second surface 312 in a face-to-back relationship. In this embodiment, the first surface 311 is the upper surface facing vertically upward, and the second surface 312 is the lower surface facing vertically downward.
[0067] The screen 31 can be configured as, for example, a component in which linear materials are woven into a mesh, or a component in which a plurality of through holes are provided on a circular plate. Fibers longer than the mesh openings of the desiccant M3 supplied to the first surface 311 of the screen 31 will remain on the screen 31, i.e., accumulate thereon, while fibers shorter than the mesh openings, or minute foreign objects such as coloring materials, will pass through the screen 31. Furthermore, by setting the mesh openings of the screen 31 to a desired size, fibers of a length suitable for sheet manufacturing can be selectively retained.
[0068] The support member 32 has the function of supporting the screen 31 to maintain the flat shape of the screen 31. In this embodiment, the support member 32 supports the screen 31 from the first surface 311 side of the screen 31. At least a portion of the screen 31 and the support member 32 are fixed, and the support member 32 is rotated by the operation of the motor 33, so that the screen 31 also rotates together.
[0069] like Figure 4 As shown, the support member 32 has an annular frame 321 that supports the edge portion of the screen 31, a central support portion 322 that supports the central portion of the screen 31, and a plurality of rod-shaped connecting portions 323 that connect the frame 321 and the central support portion 322.
[0070] In this embodiment, the connecting portion 323 is a straight rod-shaped prism with a quadrilateral cross-section. In other words, the connecting portion 323 is a long strip-shaped component extending from the center of the screen 31 across its outer periphery. Furthermore, in this embodiment, each connecting portion 323 is arranged in a radial pattern, that is, four are equally spaced along the circumference of the screen 31. The shape of the connecting portion 323 is not limited to the above structure; for example, it can be any shape such as a cylindrical rod.
[0071] Such a rotating component 3 is connected to a motor 33, which serves as a drive unit, and can rotate around the central axis O through the operation of the motor 33. Furthermore, the motor 33 is configured such that its rotational speed is variable depending on the energizing conditions, and its operation is controlled by the control unit 28. In this embodiment, the rotating component 3 rotates along... Figure 4 The arrow in the diagram indicates the direction of rotation, i.e., clockwise rotation when viewed from the first face 311 side.
[0072] The first ejector portion 4 is disposed on the first surface 311 side of the screen 31. In this embodiment, as... Figure 1 As shown, when viewed from the -y-axis side towards the +y-axis direction, the first ejector 4 is positioned to the right of the central axis O of the screen 31. The first ejector 4 is connected to the downstream end of the pipe 242 and has a first nozzle 41 at a position facing the first surface 311 of the screen 31. The first ejector 4, through the airflow generated by the blower 261, simultaneously ejects air and de-fiber material M3 from the first nozzle 41 from above towards the screen 31, i.e., from the first surface 311 side towards the second surface 312. This allows the de-fiber material M3 to be supplied to the first surface 311 of the screen 31 and accumulated thereon.
[0073] Furthermore, the first nozzle 41 is configured to be separate from the first surface 311 of the screen 31. As a result, the defiber material M4 accumulated on the first surface 311 of the screen 31 can be moved along with the rotation of the screen 31.
[0074] Furthermore, the opening surface of the first nozzle 41 extends circumferentially along the screen 31. Specifically, when viewed from above, the first nozzle 41 has the following shape: an arc 411 located at the center of the screen 31, an arc 412 located on the outer periphery compared to arc 411, and line segments 413 and 414 connecting the ends of these arcs to each other. Arcs 411 and 412 are circumferentially along the screen 31, with one arc 412 being longer than the other. Furthermore, line segments 413 and 414 are arranged in this order from the front of the screen 31 in the direction of rotation and are positioned radially along the screen 31.
[0075] By supplying the defiber material M3 from the first nozzle 41 of this shape onto the first surface 311 of the screen 31, the defiber material M3 can be supplied and accumulated along the rotation direction of the screen 31.
[0076] The first suction unit 5 is disposed on the second surface 312 side of the screen 31 and is disposed on the opposite side of the first discharge unit 4, separated by the screen 31. The first suction unit 5 has a first suction port 51, which is disposed at a position overlapping with the first discharge port 41 when viewed from the central axis O direction of the screen 31. Furthermore, the first suction unit 5 is connected to the blower 262 via the pipe 245, and air can be drawn from the first suction port 51 by the operation of the blower 262. In addition, a recovery unit 27, for example, consisting of a filter, is provided on the upstream side of the pipe 245 compared to the blower 262. As a result, fibers or foreign objects sucked up by the first suction unit 5 can be captured and recovered.
[0077] Furthermore, the opening surface of the first suction port 51 extends circumferentially along the screen 31. Specifically, when viewed from above, the first suction port 51 has the following shape: an arc 511 located at the center of the screen 31, an arc 512 on the outer periphery compared to arc 511, and line segments 513 and 514 connecting the ends of these arcs. Arcs 511 and 512 are circumferentially along the screen 31, with one arc 512 being longer than the other. Furthermore, line segments 513 and 514 are arranged in this order from the front of the screen 31 in the direction of rotation and are positioned radially along the screen 31.
[0078] Furthermore, in other words, the first suction port 51, which serves as the suction port, has a shape in which the opening width increases from the center of the screen towards the outer periphery. Although the circumferential movement speed of the screen 31 increases as it moves towards the outer periphery, the aforementioned structure allows for sufficient suction of the debonded material M3 or M4 even at the outer periphery. In this case, the opening width refers to the length along the direction of the arc 511 or arc 512.
[0079] By suctioning the defiber material M3 through the first suction port 51 of this shape, the defiber material M3 accumulated along the rotation direction of the screen 31 can be suctioned through the screen 31. Therefore, suction can be performed according to the shape of the accumulation of defiber material M3 on the screen 31, thereby removing foreign matter and short fibers from the defiber material M3 without omission.
[0080] The second ejector 6 is disposed on the second surface 312 side of the screen 31, and at a different position from the first suction part 5, that is, it is disposed in front of the screen 31 in the rotational direction compared to the first suction part 5. In this embodiment, as Figure 1 As shown, the second ejector 6, when viewed from the +y axis side towards the -y axis side, is positioned to the left of the central axis O of the screen 31. The second ejector 6 has a second nozzle 61 on the second surface 312 facing the screen 31. Furthermore, the second ejector 6 is connected to a blower 263 via a pipe 243, and airflow is generated by the operation of the blower 263, allowing air to be ejected from the second nozzle 61. Moreover, the second nozzle 61 ejects air from the second surface 312 side of the screen 31 towards the de-fibrillated material M4 on the first surface 311 via the screen 31. This allows the de-fibrillated material M4 on the screen 31 to be peeled off from the first surface 311 of the screen 31. Thus, the de-fibrillated material M4 can be effectively recovered by suction performed by the second suction unit 7, described below.
[0081] Furthermore, the opening surface of the second nozzle 61 is curved along the circumference of the screen 31. Specifically, when viewed from above, the second nozzle 61 has the following shape: an arc 611 located at the center of the screen 31, an arc 612 on the outer periphery compared to arc 611, and line segments 613 and 614 connecting the ends of these arcs to each other. Arcs 611 and 612 are along the circumference of the screen 31, with one arc 611 being longer than the other. Furthermore, line segments 613 and 614 are arranged in this order from the front of the screen 31 in the direction of rotation and are positioned radially along the screen 31.
[0082] By spraying air from the second nozzle 61 of this shape toward the defiber material M4 on the screen 31, the defiber material M3 can be peeled off and detached from the screen 31 along the rotation direction of the screen 31.
[0083] The second suction unit 7 is located on the first surface 311 side of the screen 31, at a different position from the first ejection unit 4, specifically, it is positioned in front of the screen 31 in the direction of rotation compared to the first ejection unit 4. Furthermore, the second suction unit 7 has a second suction port 71 on the first surface 311 facing the screen 31, and when viewed from the central axis O of the screen 31, the second suction port 71 is positioned overlapping with the second ejection port 61. The second suction unit 7 is connected to the downstream end of the pipe 172 of the mixing unit 17. Airflow is generated by the operation of a blower 173 located midway along the pipe 172, enabling suction from the second suction port 71. Thus, the defiber material M4 stripped from the screen 31 by the second ejection unit 6 can be suctioned and recovered, and the defiber material M4 can be delivered downstream, i.e., into the mixing unit 17.
[0084] Furthermore, the second suction port 71 is provided separately from the first surface 311 of the screen 31. This prevents the suction force of the second suction part 7 from hindering the rotation of the screen 31, thereby facilitating the smooth rotation of the screen 31.
[0085] Furthermore, the opening surface of the second suction port 71 is curved along the circumference of the screen 31. Specifically, when viewed from above, the second suction port 71 has the following shape: an arc 711 located at the center of the screen 31, an arc 712 on the outer periphery compared to arc 711, and line segments 713 and 714 connecting the ends of these arcs. Arcs 711 and 712 are along the circumference of the screen 31, with one arc 712 being longer than the other. Furthermore, line segments 713 and 714 are arranged in this order from the front of the screen 31 in the direction of rotation and are positioned radially along the screen 31.
[0086] By sucking the defiber material M4 on the screen 31 through the second suction port 71 of this shape, the defiber material M4 can be recovered along the rotation direction of the screen 31.
[0087] Thus, the second suction unit 7 functions as a recycling suction unit for suctioning and recovering the material, i.e., the defiber material M4, accumulated on the first surface 311 of the screen 31. By using suction for recycling, it is possible to recover the material without contact with the defiber material M4, thereby reducing damage to the defiber material M4.
[0088] Through this defiber-splitting device 1, the defiber-splitting material M3 becomes a defiber-splitting material M4 containing fibers of the desired length and having foreign matter removed, which can then be conveyed downstream to become a high-quality sheet S.
[0089] The control unit 28 includes a CPU (Central Processing Unit) 281 and a storage unit 282. The CPU 281 is capable of performing various judgments and commands, for example.
[0090] Storage unit 282 stores, for example, various programs such as programs related to the separation of foreign objects and programs for manufacturing the sheet S, as well as calibration curves described later.
[0091] Furthermore, the control unit 28 can be either built into the fabric manufacturing apparatus 100 or installed in an external device such as a computer. In this case, communication between the external device and the fabric manufacturing apparatus 100 can be either wireless or wired communication.
[0092] Furthermore, the CPU 281 and the storage unit 282 can be integrated into one unit, or the CPU 281 can be built into the fiber manufacturing apparatus 100 and the storage unit 282 can be installed in an external device such as a computer. Alternatively, the storage unit 282 can be built into the fiber manufacturing apparatus 100 and the CPU 281 can be installed in an external device such as a computer.
[0093] Furthermore, depending on the thickness of the raw material M1 or the set amount of quantitative supply in the coarse crushing section 12, unevenness may occur in the thickness of the defiberized material M3 accumulated on the screen 31. It is shown that the thicker the defiberized material M3 on the screen 31, the greater the amount of fiber sucked up along with foreign matter in the first suction section 5; conversely, the thinner the defiberized material M3 on the screen 31, the less the amount of fiber sucked up along with foreign matter in the first suction section 5. When the amount of fiber sucked up in the first suction section 5 varies, there is a possibility that the thickness of the second sheet M8 downstream of it, or the thickness of the sheet S, may also vary. To solve this problem, the control unit 28 performs the following control.
[0094] like Figure 5 As shown, in step S101, firstly, each part of the fiber manufacturing apparatus 100 is operated to begin sheet manufacturing. The defiberizing apparatus 1 is configured such that, before the defiber material M3 is supplied from the first ejection section 4, the first ejection section 4, the first suction section 5, the second ejection section 6, and the second suction section 7 are operated while the screen 31 is rotated, so that air is ejected or sucked from their openings.
[0095] In step S102, the thickness of the manufactured sheet S is detected in the material preparation unit 22. In this step, the thickness can be detected one sheet at a time, or the thickness of a sheet S can be detected after multiple sheets.
[0096] Next, in step S103, the rotational speed of the rotating component 3 is determined, that is, the energizing conditions of the motor connected to the screen 31 are determined. In this embodiment, the rotational speed of the rotating component 3 is determined based on the calibration curve stored in the storage unit 282. The calibration curve is a calibration curve derived in advance to ensure an appropriate suction time based on the thickness of a sheet S, and it is a calibration curve that shows the relationship between the thickness of the sheet S and the rotational speed of the rotating component 3.
[0097] In step S103, the rotation speed of the screen 31 is determined based on the thickness of the sheet S detected in step S102 and the above-mentioned correction curve.
[0098] In addition, it is not limited to the calibration curve. For example, the rotation speed of the screen 31 can also be determined based on a table showing the relationship between the thickness of the sheet S and the rotation speed of the screen 31.
[0099] Next, in step S104, a process is performed. That is, the motor is driven to rotate the screen 31 at the rotational speed determined in step S103.
[0100] Then, in step S105, it is determined whether the process related to sheet manufacturing has been completed. This determination is made, for example, based on whether the number of manufactured sheets S has reached the target number. If, in step S105, it is determined that the process has not been completed, the process returns to step S102, and the subsequent steps are repeated sequentially.
[0101] Thus, in the defiberization apparatus 1, the rotation speed of the screen 31 is adjusted according to the thickness of the sheet S. A variation in the thickness of the sheet S refers to an uneven thickness of the defiber material M3 accumulated on the screen 31. According to the present invention, the rotation speed can be adjusted according to the thickness of the defiber material M3, thereby adjusting the overall suction time of the first suction unit 5 in suctioning the defiber material M3. Therefore, the amount of fiber sucked by the first suction unit 5 from the defiber material M3 can be adjusted, thereby maintaining the amount of defiber material M4 discharged from the separation unit 10 as constant as possible. As a result, the thickness of the second sheet M8 can be set to the desired thickness, and consequently, the thickness of the manufactured sheet S can be set to the desired thickness.
[0102] As described above, the fiber manufacturing apparatus 100 includes: a raw material supply section 11 and a coarse crushing section 12, which supply materials containing fibers; a defibering section 13, which defibers coarse fragments M2, an example of materials supplied from the coarse crushing section 12; and a separation section 10, which includes a rotating member 3, a first suction section 5, a suction section, and a second ejection section 6 and a second suction section 7, an example of recovery sections. The rotating member 3 has a first surface 311 and a second surface 312 in a face-back relationship, and at least a portion of the rotating member 3 is composed of a screen 31, so that the defiberized material M3 generated by the defibering section 13 is supplied to the first surface 311. The first suction unit 5 is disposed on the second surface 312 side of the rotating component 3, and suctions the defiber material M3 through the screen 31 to remove foreign matter. The second ejection unit 6 and the second suction unit 7 recover the defiber material M4 on the first surface 311 after the foreign matter has been removed. The sheet forming unit 19, which serves as the accumulation unit, accumulates the defiber material M4 after the foreign matter has been removed. The sheet forming unit 20 forms a second sheet M8, which is the accumulation generated by the sheet forming unit 19, into a sheet shape. The thickness detection unit 8 detects the thickness of the sheet formed by the sheet forming unit 20. The control unit 28 controls the operation of the separation unit 10 based on the detection result of the thickness detection unit 8. Thus, by detecting the thickness of the sheet S and controlling the operation of the separation unit 10 based on the detection result, the amount of fiber sucked by the first suction unit 5 from the defiber material M3 can be adjusted. Therefore, the amount of defiber material M4 discharged downstream from the separation section 10 can be kept as constant as possible. As a result, the thickness of the second sheet M8 can be set to the desired thickness, and thus the thickness of the manufactured sheet S can be set to the desired thickness.
[0103] Furthermore, the control unit 28 adjusts the rotation speed of the rotating component 3 based on the detection results of the thickness detection unit 8. Thus, by simply adjusting the rotation speed of the rotating component 3, the amount of fiber drawn by the first suction unit 5 from the defiberized material M3 can be adjusted. Therefore, the thickness of the second sheet M8 can be set to the desired thickness, and consequently, the thickness of the manufactured sheet S can be set to the desired thickness.
[0104] Furthermore, the control unit 28 increases the rotation speed of the rotating member 3 as the thickness of the sheet S increases, and decreases the rotation speed of the rotating member 3 as the thickness of the sheet S decreases. This allows for adjustment of the amount of fiber drawn from the desiccant M3 by the first suction unit 5. Therefore, the thickness of the second sheet M8 can be set to a desired thickness, and consequently, the thickness of the manufactured sheet S can be set to a desired thickness.
[0105] Furthermore, the control unit 28 has a storage unit 282, in which a correction curve representing the relationship between the thickness of the sheet S and the rotation speed of the rotating member 3 is stored. This allows for accurate setting of the rotation speed of the rotating member 3, corresponding to the thickness of the sheet S.
[0106] Furthermore, the fiber manufacturing apparatus 100 includes a material preparation section 22 for storing sheet S, and a thickness detection section 8 is provided in the material preparation section 22. By detecting the thickness of the manufactured sheet S and feeding back the change in the thickness of the sheet S to the operation of the separation section 10, the operation of the separation section 10 can be adjusted more accurately.
[0107] Second Implementation Method
[0108] Figure 6 This is a flowchart illustrating the control operations performed by the control unit included in the fiber manufacturing apparatus of the second embodiment of the present invention.
[0109] Although the fiber manufacturing apparatus and the fiber unwinding apparatus of the second embodiment of the present invention will be described below with reference to the figures, the description will focus on the differences from the aforementioned embodiments, and the same matters will be omitted from the description.
[0110] In this embodiment, only the control of step S103 (step S203) in the first embodiment is different, while the other steps are the same as in the first embodiment.
[0111] like Figure 6 As shown, in step S203, the suction force of the first suction unit 5 is determined, that is, the energizing conditions for the blower 262 are determined. In this embodiment, the suction force of the first suction unit 5 is determined based on the calibration curve stored in the storage unit 282. The calibration curve is a calibration curve derived in advance to ensure an appropriate suction force based on the thickness of the sheet S, and it is a calibration curve that represents the relationship between the thickness of the sheet S and the suction force of the first suction unit 5.
[0112] In step S203, the suction force of the first suction unit 5 is determined based on the thickness detected in step S102 and the above-mentioned correction curve.
[0113] Thus, in the fiber-debonding apparatus 1, the control unit 28 adjusts the suction force of the first suction unit 5, which serves as the suction unit, based on the detection results of the thickness detection unit 8. This allows for the adjustment of the amount of fiber drawn from the debonded material M3 by the first suction unit 5. Consequently, the thickness of the second sheet M8 can be set to the desired thickness, and consequently, the thickness of the manufactured sheet S can be set to the desired thickness.
[0114] Furthermore, the control unit 28 increases the suction force of the first suction unit 5, which is a suction unit, as the thickness of the sheet S increases, and decreases the suction force of the first suction unit 5 as the thickness of the sheet S decreases. Therefore, the amount of fiber drawn by the first suction unit 5 from the desiccant M3 can be adjusted. Thus, the thickness of the second sheet M8 can be set to a desired thickness, and consequently, the thickness of the manufactured sheet S can be set to a desired thickness.
[0115] Furthermore, the control unit 28 has a storage unit 282, in which a correction curve representing the relationship between the thickness of the sheet S and the suction force of the first suction unit 5, which is a suction unit, is stored. By detecting the thickness of the sheet S after it has been manufactured and feeding back the variation in the thickness of the sheet S to the operation of the separation unit 10, the operation of the separation unit 10 can be adjusted more accurately.
[0116] Third Implementation Method
[0117] Figure 7 This is a schematic side view of the thickness detection unit and its surrounding parts provided in the fiber manufacturing apparatus according to the third embodiment of the present invention.
[0118] Although the fiber manufacturing apparatus and the fiber unwinding apparatus of the third embodiment of the present invention will be described below with reference to the figures, the description will focus on the differences from the aforementioned embodiments, and the same matters will be omitted from the description.
[0119] like Figure 7 As shown, the thickness detection unit 8 is located upstream of the cutting unit 21. That is, the thickness detection unit 8 is located between the calendering roll 203 and the heating roll 204, thereby continuously detecting the thickness of the sheet S before cutting. With this structure, changes in the thickness of the sheet S can be detected more quickly, and the thickness of the sheet S can be fed back to the working of the separation unit 10 in more real time.
[0120] Fourth Implementation Method
[0121] Figure 8 This is a schematic side view of the thickness detection unit and its surrounding parts provided in the fiber manufacturing apparatus according to the fourth embodiment of the present invention.
[0122] Although the fiber manufacturing apparatus and the fiber unwinding apparatus of the fourth embodiment of the present invention will be described below with reference to the figures, the description will focus on the differences from the aforementioned embodiments, and the same matters will be omitted from the description.
[0123] like Figure 8As shown, the thickness detection unit 8 is located upstream of the sheet forming unit 20 and above the mesh belt 191. The thickness detection unit 8 detects the thickness of the second sheet M8. With this structure, compared to the embodiment described above, variations in the amount of desiccant M4 discharged from the separation unit 10 can be detected closer to it. Therefore, the operation of the separation unit 10 can be adjusted more in real time.
[0124] As described above, the defiberizing apparatus 1 includes: a raw material supply section 11 and a coarse crushing section 12, which supply materials containing fibers; a defiberizing section 13, which defibers coarse fragments M2, an example of materials supplied from the coarse crushing section 12; and a separation section 10, which includes a rotating member 3, a first suction section 5, a suction section 5, and a second ejection section 6 and a second suction section 7, an example of recovery sections, wherein the rotating member 3 has a first surface 311 and a second surface 312 in a face-back relationship, and at least a portion of the rotating member 3 is composed of a screen 31, so that the defiberized material M3 generated by the defiberizing section 13 is supplied to the first surface 311. On the first part 11, the first suction unit 5 is provided on the second surface 312 side of the rotating member 3, and suctions the defiber material M3 through the screen 31 to remove foreign matter. The second ejection unit 6 and the second suction unit 7 recover the defiber material M4 on the first surface 311 after the foreign matter has been removed. The sheet forming unit 19, which serves as the accumulation unit, accumulates the defiber material M4 after the foreign matter has been removed. The sheet forming unit 20 forms the second sheet M8, which is the accumulation generated by the sheet forming unit 19, into a sheet shape. The thickness detection unit 8 detects the thickness of the second sheet M8. The control unit 28 controls the operation of the separation unit 10 based on the detection result of the thickness detection unit 8. Thus, by detecting the thickness of the second sheet M8 and controlling the operation of the separation unit 10 based on the detection result, the amount of fiber sucked by the first suction unit 5 from the defiber material M3 can be adjusted. Therefore, the amount of defiber material M4 discharged downstream from the separation section 10 can be kept as constant as possible. As a result, the thickness of the second sheet M8 can be set to the desired thickness, and thus the thickness of the manufactured sheet S can be set to the desired thickness.
[0125] Although the fiber manufacturing apparatus and the fiber unwinding apparatus of the present invention have been described above with reference to the illustrated embodiments, the present invention is not limited thereto, and the various parts constituting the fiber manufacturing apparatus and the fiber unwinding apparatus can be replaced with any structure that can perform the same function. In addition, any structure may be added.
[0126] Furthermore, the fiber manufacturing apparatus and the fiber unwinding apparatus of the present invention can also combine any two or more structures or features in the various embodiments.
[0127] Furthermore, although the material supply unit in the various embodiments is a structure having a raw material supply unit and a coarse crushing unit, it is not limited to this in the present invention. For example, it may also be composed of a box for supplying coarse crushing.
[0128] Furthermore, although in the various embodiments the rotating component is a structure that is circular when viewed from above and rotates around a central axis, this invention is not limited to this. For example, it may also be a structure in which the screen is made of a seamless belt and is wound on multiple rollers for cyclic rotation.
[0129] Furthermore, although the first nozzle, the first suction port, the second nozzle, and the second suction port have been described in the embodiments as having a curved shape surrounded by two arcs and two straight lines, this invention is not limited to this. For example, they may also be any shape such as rectangles, polygons, or circles.
[0130] Furthermore, the first spray outlet, the first suction port, the second spray outlet, and the second suction port may also have a structure with multiple openings. In this case, it is preferable to have a structure in which the number of openings increases as it moves toward the outer periphery of the screen.
[0131] Furthermore, while the shapes of the first nozzle, the first suction port, the second nozzle, and the second suction port are not limited to the structures shown in the figure, and can be any shape, it is preferable that when the opening is divided by an arc at the midpoint of the opening surface passing through the screen in a radial direction, the outer peripheral portion has a larger area than the inner peripheral portion. Additionally, the arc referred to herein is defined as the curvature along the outer edge of the screen.
[0132] Symbol Explanation
[0133] 100…fiber manufacturing apparatus; 1…fiber debonding apparatus; 10…separation section; 3…rotating component; 31…screen; 311…first surface; 312…second surface; 32…support component; 321…frame; 322…central support section; 323…connecting section; 33…motor; 4…first ejection section; 41…first ejection port; 411…arc; 412…arc; 413…line segment; 414…line segment; 5…first suction section; 51…first suction port; 511…arc; 512…circle Arc; 513…line segment; 514…line segment; 6…second ejection section; 61…second ejection outlet; 611…circular arc; 612…circular arc; 613…line segment; 614…line segment; 7…second suction section; 71…second suction port; 711…circular arc; 712…circular arc; 713…line segment; 714…line segment; 8…thickness detection section; 11…raw material supply section; 12…coarse crushing section; 121…coarse crushing blade; 122…groove; 123…quantitative supply section; 13…fiber debonding section; 17…mixing section; 171… Binder supply section; 172… Pipe; 173… Blower; 174… Screw feeder; 18… Disassembly section; 181… Roller section; 182… Housing section; 19… Sheet forming section; 191… Mesh belt; 192… Supporting roller; 193… Suction section; 20… Sheet forming section; 201… Pressurizing section; 202… Heating section; 203… Calendering roller; 204… Heating roller; 21… Cutting section; 211… First shear; 212… Second shear; 22… Material preparation section; 231… Humidification section; 234… Humidification section; 236… Humidification section; 241… Pipe; 242… Pipe; 243… Pipe; 245… Pipe; 246… Pipe; 261… Blower; 262… Blower; 263… Blower; 264… Blower; 27… Recovery section; 28… Control section; 281… CPU; 282… Storage section; M1… Raw material; M2… Coarse fragments; M3… Defiberized material; M4… Defiberized material; M7… Mixture; M8… Sheet; O… Central shaft; S… Sheet; P1… Binder.
Claims
1. A fiber manufacturing apparatus, characterized in that, have: The materials supply department supplies materials containing fibers; The defiberization section defibers the material supplied from the material supply section; The separation section includes a rotating component, a suction section, and a recovery section. The rotating component has a first surface and a second surface in a face-to-back relationship, and at least a portion of the rotating component is composed of a screen to supply the defiber material generated by the defiber section to the first surface. The suction section is disposed on the second surface side of the rotating component and suctions the defiber material via the screen to remove foreign matter. The recovery section recovers the defiber material on the first surface after the foreign matter has been removed. An accumulation section, which allows the defiberized material to accumulate after the foreign matter has been removed; A sheet-forming section that forms a sheet from the deposit generated by the stacking section; A thickness detection unit that detects the thickness of the sheet formed by the sheet forming unit; The control unit controls the operation of the separation unit based on the detection results of the thickness detection unit. The control unit increases the suction force of the suction unit as the thickness of the sheet increases, and decreases the suction force of the suction unit as the thickness of the sheet decreases.
2. The fiber manufacturing apparatus as described in claim 1, wherein, The control unit adjusts the rotation speed of the rotating component based on the detection results of the thickness detection unit.
3. The fiber manufacturing apparatus as described in claim 2, wherein, The control unit increases the rotation speed of the rotating component as the thickness of the sheet increases, and decreases the rotation speed of the rotating component as the thickness of the sheet decreases.
4. The fibrous body manufacturing apparatus as described in claim 2 or 3, wherein, The control unit has a storage unit that stores a correction curve representing the relationship between the thickness of the sheet and the rotational speed of the rotating component.
5. The fiber manufacturing apparatus as described in claim 1, wherein, The control unit has a storage unit that stores a correction curve representing the relationship between the thickness of the sheet and the suction force of the suction unit.
6. The fibrous body manufacturing apparatus as claimed in claim 1, wherein, It has a material preparation section, which stores the thin sheets. The thickness detection unit is located in the material preparation unit.
7. A fiber unwinding device, characterized in that, have: The materials supply department supplies materials containing fibers; The defiberization section defibers the material supplied from the material supply section; The separation section includes a rotating component, a suction section, and a recovery section. The rotating component has a first surface and a second surface in a face-to-back relationship, and at least a portion of the rotating component is composed of a screen to supply the defiber material generated by the defiber section to the first surface. The suction section is disposed on the second surface side of the rotating component and suctions the defiber material through the screen to remove foreign matter. The recovery section recovers the defiber material on the first surface after the foreign matter has been removed. An accumulation section, which allows the defiberized material to accumulate after the foreign matter has been removed; A thickness detection unit that detects the thickness of the deposit generated using the depositing unit; The control unit controls the operation of the separation unit based on the detection results of the thickness detection unit. The control unit increases the suction force of the suction unit as the thickness of the deposit increases, and decreases the suction force of the suction unit as the thickness of the deposit decreases.